Kylie Jenner dressed up as a massive butterfly.

Jenner shared the photo on Instagram with the caption, "Butterfly Effect." She and Travis Scott, the father of their daughter Stormi, have matching tattoos of a small butterfly. Scott also has a song named "Butterfly Effect."

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On Halloween, Kylie shared a second costume as a Barbie doll in the box.

Gabrielle Union channeled her inner Stefani while husband, Dwyane Wade, dressed up as the Fresh Prince.

The "Bring it On" actress dressed up as the "No Doubt" singer to her '90s-themed birthday party that coincided with the Halloween weekend. Watch her rock out here. Her husband channeled Will Smith in his "Fresh Prince of Bel-Air" look.